I've used a lot of bluetooth ear pieces, some of them I really like. But the biggest problem I've had is fitting them in my ears. I guess my ears are not shaped like anything considered average, so the single ear pieces (e.g., jawbone which is my favorite in that category) are uncomfortable and often just won't fit well enough to stay in my ear. So the wrap-around design fixes that problem (they cannot come out of my ears), and the Nokia BH-505 works fantastically as a BT headset, especially if you need to listen well in a noisy environment - I can block out almost all external sounds if I want to. I use it for conference calls all the time and people tell me the sound is good on their end so the mic does its job too. I use the Nokia exclusively now.